A42F safety valve is applicable to low temperature or flammable and explosive medium pipelines with the temperature of -40~80°C, such as liquefied petroleum gas, liquid ammonia, methane, propane, etc., as an overpressure protection device.

AH42F is applicable to the liquid phase return pipeline at the outlet of the LPG tank pump with the working temperature of -40~80°C. When the differential pressure between the inlet and outlet is greater than 0.5MPa, the LPG can automatically return into the tank.